Place the chicken breast in a shallow bowl and pour the buttermilk over it, letting it marinate for at least 15 minutes to tenderize.
In a separate small bowl, whisk together the almond flour, arrowroot powder, garlic powder, sea salt, and black pepper to create the coating.
Remove the chicken from the buttermilk, allowing excess liquid to drip off, then dredge it thoroughly in the flour mixture until fully coated.
Heat the avocado oil in a cast-iron skillet over medium heat until shimmering.
Carefully place the chicken in the skillet and cook for 5-6 minutes per side until the crust is golden brown and the internal temperature reaches 165°F.
In a small ramekin, whisk the honey with the cayenne pepper until well combined.
Drizzle the spicy honey over the hot, crispy chicken immediately before serving.